Abstract: In order to guarantee the quality of driven pile and increase the efficiency of pile driving,one dimensional stress wave theory is adopted to analye the interaction mechanism of the system of hammer-pile-soil and establish the simplified model of dynamic pile driving,and analytical solution of penetration is presented in the thesis.It can quantitatively analyze affection of impact force,force duration time and penetration by some parameters including weight and drop height of the hammer mass,stiffness and thickness of cushion,and weight of cap cushion.According to curves of driving pile,the wave equation method is used to select optimum pile driving hammers and components of pile driving system.The Case studies indicate that estimated values are well consistent with measured one,which proves that the method is precise and effective.This method can provide valuable reference for optimum design and construction of pile foundation.

Key words: stress wave theory； pile foundation； pile driving system；